Jacob r



J. R. SPANGLER. SHEET METAL EDGING MACHINE.

Patented Mar. 17, 1891.

, a mv/ [WW 2 UNITED STATES PATENT OFFICE.

. JACOB R. SPANGLER, OF NEl/VARK, NElV JERSEY, ASSIGNOR OF ONE-HALF I TO ALEXANDER P. BALDWIN, OF SAME PLACE.

SHEET-METAL-EDGING MACHINE.

SPECIFICATION forming part of Letters Patent No. 448,380, dated March 17, 1891.

Application filed June 22, 1888. Serial No. 277,867. (No model.)

T at whom it may concern.-

' Be it known that I, JACOB R. SPANGLER, of Newark, New Jersey, have invented a new and useful Improvement in Sheet-Metal-Edging Machines, of which the following is such full, clear, and exact description as will enable others skilled in the art to which it most nearly appertains to make and use the same when taken in connection with the accompanying drawings, in which- Figure 1 is a perspective view of the machine with a sheet of metal bent. Fig. 2 is a cross-section on the line y y. Fig. 3 is a crossseciion on the line a; a: when the machine is in position to receive a sheet of metal, the metal being shown in position ready to bend. Fig. 4 is a detail view of the folding-knife. Fig. 5 is an end view of a sheet bent on the machine.

This my invention relates to that class of edging-machines in which the sheet to be folded is rested on a table and the edge is passed into a groove or folder, which is so journaled that it can be turned on its axis, and thus fold the sheet metal; and it consists in so constructing the journals and journalboxes of the folder that the folded sheet may he slipped through them and the various combinations hereinafter specified and claimed. Before this my invention sheet-metal-edging machines had been made with a journal at one end only fitting in a journal-box, leaving the other end free and unsupported. The folder in that form was liable to and did bend and spring away from the edge of the table at the unsupported end, making a varying or uneven fold.

The table A is supported on proper legs and has a straight edge on the side on which the journalboxes B B are situated. The journal-boxes are provided at the ends of one side-that is to say, at two adjacent cor ners. These journal-boxes B B are made with a part cut away at or near the table, as clearly shown in Fig. 3. The folder 0 is made with a handleD at or near the center, and at each end has a journal E E made hollow at the center and cut away through 'part of the circumference, so that the journal continues only about three -fourths of the circumference.

This cut-away part is so arranged that when the folder 0 is in the position shown in Fig. 2 the outer face of the journal and the inner face of the j ournal-box will correspond, and the cut-away parts of each will accordingly 5 correspond, thus making a clear passage for the sheet of metal, as shown in Fig. 2-: Attached to the folder are the counter-weights F F, one at each end, so arranged as to throw the folder 0 and handle D up when the ma- 6o chine is in the position shown in Fig. 3. At each end of the machine is the yielding stop G, which consists of a spring-actuated pin or bolt, as shown, against which a proper projection h on the journal of the folder comes in contact when the handle D is forced over to fold the metal sheet, and the retractors G G throw the handle D up to the position shown in Fig. 2, when it is released from the hand of the op erator. The folding-bladed consists of a piece of grooved steel. (Shown in detail in Fig.4.) The groove is narrow about the width of the sheet of metal to be folded. This blade is attached to the folder by screws and may be removed and another placed on at will.

The mode of operation is as follows: The handle D being placed in the position shown in Fig. 3, the weights F throw the handle up, as shown, and bring the groove of the folderblade opposite the edge of the table. The edge of the sheet of metal to be folded is now placed in the groove of the folder-blade, and the handle D is turned over to the position shown in Fig. 1, being forced as far as it will go until the springs of the retractors G are compressed. The handle is then released and the retractors raise it to the position shown in Fig. 2. The handle, and consequently the folder, having been revolved through nearly three-fourths of a revolution, the sheet metal 0 is given the form shown in Fig. 5. The sheet may be slipped along the groove and out the end of the groove through the journal E and journal-bearing B.

It is seen that this machine gives a folder 5 support throughout its entire operation at each end and from which the folded or edged metal sheets may be removed at either end.

What I claim as new, and desire to secure by Letters Patent is--- we 1. In a metal-edging machine, the combination, with the hollow supporting-bearings, of a folder having a groove and provided with hollow journals having cut-away portions in line with said groove, said bearings being also providedwith cut-away portions, whereby the material may be inserted or removed from either end of the folder through the said cutaway portions of the journals and bearings, substantially as described.

2. In a metal-edging machine, the combination, with the hollow supporting-journals provided with cut-away portions in line with each other,of the folderprovided with a groove having its journals engaging said bearings and provided with cut-away portions in line with each other and with said groove, whereby said out away portions and groove of the folder, journals, and bearings may be brought into alignment to form an open slotor recess from one end to the other, substantially as described.

In a metal-edging machine, the combination, with the movable folder having journals engaging suitable bearings, one of said journals having a projection, of ayielding stop in the path of said projection adapted to move said journal and folder in a direction to restore it to normal position after folding, substantially as described.

4. In a metal-edging machine, the combination, with the movable folder having journals engaging suitable bearings, one of said journals having a projection, of a plunger in the path of said projection, and a retractionspring engaging said plunger, said spring and plungerforming a yielding stop for said folder and adapted to move said journal and folder in a direction to restore it to normal position when said spring is compressed, substantially as described.

JACOB R. SPANGLER.

Witnesses:

FREDK. 'l. J OHNSON, HENRY J. BLoEMEcKE, Jr. 

